166 lines
6.8 KiB
C++
166 lines
6.8 KiB
C++
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// RUN: %libomp-cxx-compile -fopenmp-version=51
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// RUN: %libomp-run | FileCheck %s --check-prefix OMP51
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#include <stdio.h>
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#include <omp.h>
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void foo() {
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#pragma omp parallel num_threads(10)
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{ printf("\ntarget: foo(): parallel num_threads(10)"); }
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}
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int main(void) {
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int tl = 4;
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printf("\nmain: thread_limit = %d", omp_get_thread_limit());
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// OMP51: main: thread_limit = {{[0-9]+}}
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#pragma omp target thread_limit(tl)
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{
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printf("\ntarget: thread_limit = %d", omp_get_thread_limit());
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int count = 0;
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// OMP51: target: thread_limit = 4
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// check whether thread_limit is honoured
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#pragma omp parallel reduction(+:count)
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{ count++; }
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printf("\ntarget: parallel: count = %d", count);
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// OMP51: target: parallel: count = {{(1|2|3|4)$}}
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// check whether num_threads is honoured
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#pragma omp parallel num_threads(2)
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{ printf("\ntarget: parallel num_threads(2)"); }
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// OMP51: target: parallel num_threads(2)
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// OMP51: target: parallel num_threads(2)
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// OMP51-NOT: target: parallel num_threads(2)
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// check whether thread_limit is honoured when there is a conflicting
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// num_threads
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#pragma omp parallel num_threads(10)
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{ printf("\ntarget: parallel num_threads(10)"); }
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// OMP51: target: parallel num_threads(10)
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// OMP51: target: parallel num_threads(10)
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// OMP51: target: parallel num_threads(10)
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// OMP51: target: parallel num_threads(10)
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// OMP51-NOT: target: parallel num_threads(10)
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// check whether threads are limited across functions
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foo();
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// OMP51: target: foo(): parallel num_threads(10)
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// OMP51: target: foo(): parallel num_threads(10)
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// OMP51: target: foo(): parallel num_threads(10)
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// OMP51: target: foo(): parallel num_threads(10)
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// OMP51-NOT: target: foo(): parallel num_threads(10)
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// check if user can set num_threads at runtime
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omp_set_num_threads(2);
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#pragma omp parallel
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{ printf("\ntarget: parallel with omp_set_num_thread(2)"); }
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// OMP51: target: parallel with omp_set_num_thread(2)
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// OMP51: target: parallel with omp_set_num_thread(2)
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// OMP51-NOT: target: parallel with omp_set_num_thread(2)
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// make sure thread_limit is unaffected by omp_set_num_threads
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printf("\ntarget: thread_limit = %d", omp_get_thread_limit());
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// OMP51: target: thread_limit = 4
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}
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// checking consecutive target regions with different thread_limits
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#pragma omp target thread_limit(3)
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{
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printf("\nsecond target: thread_limit = %d", omp_get_thread_limit());
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int count = 0;
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// OMP51: second target: thread_limit = 3
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#pragma omp parallel reduction(+:count)
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{ count++; }
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printf("\nsecond target: parallel: count = %d", count);
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// OMP51: second target: parallel: count = {{(1|2|3)$}}
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}
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// confirm that thread_limit's effects are limited to target region
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printf("\nmain: thread_limit = %d", omp_get_thread_limit());
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// OMP51: main: thread_limit = {{[0-9]+}}
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#pragma omp parallel num_threads(10)
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{ printf("\nmain: parallel num_threads(10)"); }
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51: main: parallel num_threads(10)
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// OMP51-NOT: main: parallel num_threads(10)
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// check combined target directives which support thread_limit
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// target parallel
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#pragma omp target parallel thread_limit(2)
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printf("\ntarget parallel thread_limit(2)");
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// OMP51: target parallel thread_limit(2)
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// OMP51: target parallel thread_limit(2)
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// OMP51-NOT: target parallel thread_limit(2)
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#pragma omp target parallel num_threads(2) thread_limit(3)
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printf("\ntarget parallel num_threads(2) thread_limit(3)");
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// OMP51: target parallel num_threads(2) thread_limit(3)
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// OMP51: target parallel num_threads(2) thread_limit(3)
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// OMP51-NOT: target parallel num_threads(2) thread_limit(3)
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#pragma omp target parallel num_threads(3) thread_limit(2)
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printf("\ntarget parallel num_threads(3) thread_limit(2)");
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// OMP51: target parallel num_threads(3) thread_limit(2)
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// OMP51: target parallel num_threads(3) thread_limit(2)
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// OMP51-NOT: target parallel num_threads(3) thread_limit(2)
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// target parallel for
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#pragma omp target parallel for thread_limit(2)
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for (int i = 0; i < 5; ++i)
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printf("\ntarget parallel for thread_limit(2) : thread num = %d",
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omp_get_thread_num());
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// OMP51: target parallel for thread_limit(2) : thread num = {{0|1}}
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// OMP51: target parallel for thread_limit(2) : thread num = {{0|1}}
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// OMP51: target parallel for thread_limit(2) : thread num = {{0|1}}
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// OMP51: target parallel for thread_limit(2) : thread num = {{0|1}}
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// OMP51: target parallel for thread_limit(2) : thread num = {{0|1}}
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// OMP51-NOT: target parallel for thread_limit(3) : thread num = {{0|1}}
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// target parallel for simd
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#pragma omp target parallel for simd thread_limit(2)
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for (int i = 0; i < 5; ++i)
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printf("\ntarget parallel for simd thread_limit(2) : thread num = %d",
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omp_get_thread_num());
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// OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}}
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// OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}}
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// OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}}
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// OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}}
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// OMP51: target parallel for simd thread_limit(2) : thread num = {{0|1}}
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// OMP51-NOT: target parallel for simd thread_limit(2) : thread num =
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// {{0|1}}
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// target simd
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#pragma omp target simd thread_limit(2)
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for (int i = 0; i < 5; ++i)
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printf("\ntarget simd thread_limit(2) : thread num = %d",
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omp_get_thread_num());
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// OMP51: target simd thread_limit(2) : thread num = {{0|1}}
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// OMP51: target simd thread_limit(2) : thread num = {{0|1}}
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// OMP51: target simd thread_limit(2) : thread num = {{0|1}}
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// OMP51: target simd thread_limit(2) : thread num = {{0|1}}
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// OMP51: target simd thread_limit(2) : thread num = {{0|1}}
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// OMP51-NOT: target simd thread_limit(2) : thread num = {{0|1}}
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// target parallel loop
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#pragma omp target parallel loop thread_limit(2)
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for (int i = 0; i < 5; ++i)
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printf("\ntarget parallel loop thread_limit(2) : thread num = %d",
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omp_get_thread_num());
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// # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}}
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// # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}}
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// # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}}
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// # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}}
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// # OMP51: target parallel loop thread_limit(2) : thread num = {{0|1}}
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// # OMP51-NOT: target parallel loop thread_limit(2) : thread num = {{0|1}}
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return 0;
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}
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